ML20116E789
| ML20116E789 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 04/24/1985 |
| From: | Mittl R Public Service Enterprise Group |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8504300415 | |
| Download: ML20116E789 (3) | |
Text
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e Pubhc Sennce Electnc and Gas Company 80 Park Plaza, Newark, NJ 07101/ 201430-8217 MAILING ADDRESS / P.O. Box 570, Newark, NJ 07101 Robert L. Mitti General Manager Nuclear Assurance and Regulation April 24, 1985 Director of Nuclear Reactor Regulation U.S.
Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, MD 20814 Attention:
Mr. Albert Schwencer, Chief Licensing Branch 2 Division of Licensing Gentlemen:
ADVISORY COMMITTEE ON REACTOR SAFEGUARDS (ACRS)
REPORT ON HCGS HOPE CREEK GENERATIN3 STATION DOCK ET NO. 50-354 In response to your letter of December 21, 1984, (A. Schwencer, NRC to R.
L.
Mittl, PSE&G) which transmitted the ACRS report on Hope Creek and requested Public Service Electric and Gas Company's (PSE&G) position regarding the ACRS recommendations noted in their report, PSE&G hereby submits the following information.
The ACRS report on HCGS recommended that a turbine overspeed protection test program be prepared and submitted to the NRC prior to full power operation.
The HCGS Turbine Overspeed Protection Test Program, is pro-Vided as Attachment I for NRC review and approval.
This program provides a description of the startup testing to be performed to evaluate turbine overspeed protection.
The ACRS report on HCGS also recommended that PSE&G consider the applicability of an " Ultimate Plant Protection System" for HCGS.
The Ultimate Plant Protection System (UPPS), as described by General Electric Company in GESSAR provides a means for mitigating potential damage to the reactor on a loss of all AC and DC electrical power.
Requisite features of this system include a blowdown path from the RPV to the suppression pool, a vent path from the suppression chamber to the atmosphere, mechanical indication of RPV and drywell parameters, and an RPV make-up water injection method.
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PSE&G ' has Jreviewed the UPPS features for compatabilitylwith
'the present-_ Hope Cre'ek ' design.
Backfitting:the-UPPS concept into Hope Creek is : technically._ feasible,_but the-number of modifications 11nvolved.would delay 1our scheduled fuel load.
idate.- JWe,' therefore, _ do not plan to pursue implementation of a.UPPS capability any further. _.We will keep abreast of
- industry developments.regarding UPPS _ implementation and evaluate same accordingly.
We= feel the above positions adequately address the ACRS recommendations. -Should you have_any questions in this regard, please contact us.
n--
Very truly yours,
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' Attachment'I - HCGS Turbine Overspeed Protection
- Test Program
' C, D.
H.<. Wagner LUSNRC':LicensingLProject Manager A. lR '. Blough USNRC Senior' Resident Inspector KH 1 01/02 Lr.
m e-
- e. -
ATTACHMENT I HCGS TURBINE OVERSPEED PROTECTION TEST PROGRAM During power ascension startup testing, a Generator Load Rejection test from 100 percent load will be conducted.
As described in FSAR 14.2.12.3.25, the test is initiated by simulating a condition that will cause'the generator breakers to open.
Turbine speed is ' monitored during the-test.
The turbine generator' system is designed so that during a loss of load, the turbine peak overspeed will be less than
-the mechanical overspeed trip setpoint.
Above 40 percent initial load this is accomplished by the power-load unbal-ance. relay.
This-relay. initiates fast closing of the con-trol-valves.
The greatest peak overspeed is a 100 percent loss of load.
By-monitoring turbine speed, this test will demonstrate that the power-load unbalance relay operates properly and the peak overspeed, for the worst case, is less than the mechan-
-ical overspeed trip setpoint.
FSAR Section 14.2.12.3.25 will be revised to include conitoring of turbine speed during each test.
References:
FSAR 14.2.12.3.25 GEK-25441C, " Normal Starting and Operating Instructions" (Part of the GE Turbine Manual)
DJD:dh 4/10/85 KH 1 03